公开(公告)号：US5990306A

公开(公告)日：1999-11-23

申请号：US922853

申请日：1997-09-03

Applicant: Richard Eugene Mayer ,  Lamberto Crescentini ,  Theodore John Jenczewski

Inventor： Richard Eugene Mayer ,  Lamberto Crescentini ,  Theodore John Jenczewski

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/12

Abstract: The present invention provides a process for the preparation of purified caprolactam comprising the steps of:(a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam;(b) removing substantially all of said water from said crude caprolactam and steam(c) distilling the resulting concentrated crude caprolactam at a pressure of less than about 8 mmHg and a temperature from about 110.degree. C. to about 145.degree. C. so as to form overheads and bottoms of the caprolactam; and(d) crystallizing the caprolactam overheads to obtain caprolactam crystals and mother liquor.The resulting purified caprolactam may then be used to make polycaprolactam which may then be used in engineered materials or spun into fiber.

Abstract translation: 本发明提供了制备纯己内酰胺的方法，包括以下步骤：（a）在蒸汽存在下解聚含聚酰胺的地毯以获得粗己内酰胺和蒸汽; （b）从所述粗己内酰胺和蒸汽中去除基本上所有的所述水;（c）在小于约8mmHg的压力和约110℃至约145℃的温度下蒸馏所得浓缩的粗己内酰胺，以便 以形成己内酰胺的塔顶馏出物和塔底物; 和（d）结晶己内酰胺塔顶馏出物以获得己内酰胺晶体和母液。 然后将所得纯化的己内酰胺用于制备聚己内酰胺，然后将其用于工程化材料或纺成纤维。

公开(公告)号：US5977193A

公开(公告)日：1999-11-02

申请号：US943795

申请日：1992-09-11

Applicant: Thomas F. Corbin ,  Alan C. Handermann ,  Richard Kotek ,  William D. Porter ,  Jack A. Dellinger ,  Edward A. Davis

Inventor： Thomas F. Corbin ,  Alan C. Handermann ,  Richard Kotek ,  William D. Porter ,  Jack A. Dellinger ,  Edward A. Davis

IPC: B29B17/02 ,  B29K77/00 ,  B29K105/26 ,  C07D201/12 ,  C08G69/14 ,  C08J11/00 ,  C08J11/14 ,  C08J11/16

CPC classification number: C08G69/14 ,  C07D201/12 ,  Y02P20/582

Abstract: .epsilon.-Caprolactam is continuously recovered from carpet made from nylon 6 face fibers and a backing. The carpet is fed to a separator to prepare scrap containing nylon 6 and auxiliary materials. The scrap from the separator is fed to a depolymerizing reactor to produce an .epsilon.-caprolactam containing distillate and more auxiliary materials. The .epsilon.-caprolactam in the distillate is separated from other volatiles and purified. The auxiliary materials are also recovered or re-used.

Abstract translation: ε-己内酰胺从由尼龙6面纤维和背衬制成的地毯连续回收。 将地毯送入隔板以制备含有尼龙6和辅助材料的废料。 将来自分离器的废料进料到解聚反应器以产生含有ε-己内酰胺的馏出物和更多的辅助材料。 馏出物中的ε-己内酰胺与其它挥发物分离并纯化。 辅助材料也被回收或重新使用。

公开(公告)号：US5668277A

公开(公告)日：1997-09-16

申请号：US632082

申请日：1996-04-15

Applicant: Jan A. J. Hendrix ,  Martin Booij ,  Yvonne H. Frentzen

Inventor： Jan A. J. Hendrix ,  Martin Booij ,  Yvonne H. Frentzen

IPC: B01J27/16 ,  C07B61/00 ,  C07C227/18 ,  C07C231/12 ,  C07C253/20 ,  C07D201/12

CPC classification number: C07D201/12 ,  C07C253/20

Abstract: One or more polyamides can be depolymerized in the presence of at least one nitrogen-containing compound. The depolymerization takes place at a pressure between about 0.5 and about 5 atm. The polyamide may be in the form of carpet waste or other heterogeneous form. Advantages include better selectivity towards the polyamide monomeric components and use of low pressure equipment to effect depolymerization.

Abstract translation: 一种或多种聚酰胺可以在至少一种含氮化合物的存在下解聚。 解聚发生在约0.5和约5atm之间的压力下。 聚酰胺可以是地毯废物或其他不同形式的形式。 优点包括对聚酰胺单体组分的更好的选择性和使用低压设备来实现解聚。

公开(公告)号：US5455346A

公开(公告)日：1995-10-03

申请号：US355283

申请日：1994-12-12

Applicant: Michael Kopietz ,  Ulrich Kalck ,  Simon Jones ,  Peter Bassler ,  Claus-Ulrich Priester

Inventor： Michael Kopietz ,  Ulrich Kalck ,  Simon Jones ,  Peter Bassler ,  Claus-Ulrich Priester

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: Caprolactam is obtained from mixtures which contain polymers or thermoplastic molding materials having the repeating unit--N(H)--(CH.sub.2).sub.5 --C(O)--(a) by cleavage at elevated temperatures in the presence of a base under reduced pressure or (b) in the presence of water, by using a mixture essentially comprisingfrom 50 to 99.9% by weight of a polymer or of a thermoplastic molding material having the repeating unit--N(H)--(CH.sub.2).sub.5 --C(O)--from 0.1 to 50% by weight of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes,from 0 to 10% by weight of organic and/or inorganic additives,from 0 to 40% by weight of non-polyamide-containing polymers andfrom 0 to 20% by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam,and carrying out the cleavage in the presence of a base under reduced pressure, the water content of the mixture used being not more than 0.01% by weight, or carrying out the cleavage in the presence of water without the addition of acid or base at from 270.degree. to 350.degree. C. and a weight ratio of water to polymer or thermoplastic molding material of from 1:1 to 20:1 and in a reaction time of less than 3 hours.

Abstract translation: 己内酰胺由含有聚合物或具有重复单元-N（H） - （CH 2）5 -C（O） - （a）的聚合物或热塑性模塑材料的混合物获得，通过在碱的存在下在减压下在升高的温度下裂解，或 （B）在水的存在下，通过使用基本上包含50-99.9重量％的聚合物或具有重复单元-N（H） - （CH 2）5 -C（O）的热塑性模塑材料的混合物， - 0.1至50重量％的选自无机填料，有机和无机颜料和染料的添加剂，0至10重量％的有机和/或无机添加剂，0至40重量％的非 - 聚酰胺的聚合物和0〜20重量％的聚酰胺，但是由己内酰胺制备的聚己内酰胺和共聚酰胺除外，在减压下在碱的存在下进行裂解，所用混合物的水含量为 不大于0.01重量％，或进行切割 在没有在270-350℃下加入酸或碱的水存在下，水与聚合物或热塑性成型材料的重量比为1:1至20:1，反应时间小于 3小时。

公开(公告)号：US5441607A

公开(公告)日：1995-08-15

申请号：US265740

申请日：1994-06-27

Applicant: Hugo Fuchs ,  Josef Ritz ,  Hans J. Wilfinger ,  David Weatherford

Inventor： Hugo Fuchs ,  Josef Ritz ,  Hans J. Wilfinger ,  David Weatherford

IPC: C07D201/12 ,  C07D201/16 ,  B01D3/34

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: Recovery of caprolactam and of an alkali metal carbonate from distillation residues which are obtained in the purification of caprolactam and contain caprolactam and/or oligomers and/or polymers of caprolactam and also alkali metal hydroxides by(a) melting the distillation residues, the caprolactam and/or oligomers and/or polymers of caprolactam and alkali metal hydroxides,(b) continuously removing caprolactam from the melt,(c) after removing caprolactam, cooling the melt and obtaining a residue,(d) dissolving the residue thus obtained in water and(e) subjecting the aqueous solution thus obtained to combustion with the formation of an alkali metal carbonateis described.

Abstract translation: 从纯化己内酰胺获得的己内酰胺和碱金属碳酸盐回收己内酰胺和/或己内酰胺和/或己内酰胺的聚合物和/或碱金属氢氧化物的齐聚物和/或碱金属氢氧化物，通过（a）将蒸馏残余物，己内酰胺和 /或己内酰胺和碱金属氢氧化物的低聚物和/或聚合物，（b）从熔体中连续除去己内酰胺，（c）除去己内酰胺后，冷却熔体并获得残余物，（d）将由此获得的残余物溶于水和 （e）描述了所得到的水溶液在形成碱金属碳酸盐时的燃烧。

公开(公告)号：US5233037A

公开(公告)日：1993-08-03

申请号：US930365

申请日：1992-08-17

Applicant: Werner Nielinger ,  Edgar Ostlinning ,  Karsten-Josef Idel ,  Dieter Freitag ,  Hans-Josef Buysch

Inventor： Werner Nielinger ,  Edgar Ostlinning ,  Karsten-Josef Idel ,  Dieter Freitag ,  Hans-Josef Buysch

IPC: C07D201/12 ,  C08G69/14 ,  C08G69/16 ,  C08J11/16 ,  C08L77/00 ,  C08L77/02

CPC classification number: C07D201/12

Abstract: The invention relates to a process for the production of caprolactam by thermal depolymerization of polyamide in the presence of small quantities of potassium carbonate at 250.degree. to 320.degree. C. and to a process for purifying the resulting caprolactam.

Abstract translation: 本发明涉及通过聚酰胺在250-320℃的少量碳酸钾存在下热解聚制造己内酰胺的方法，以及纯化所得己内酰胺的方法。

公开(公告)号：US3925365A

公开(公告)日：1975-12-09

申请号：US44106174

申请日：1974-02-11

Applicant: KANEBO LTD

Inventor： IZAWA NOBUO ,  KOHNO TOSHIHIKO

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: Epsilon -CAPROLACTAM MATERIAL SUCH AS A MONOMER, OLIGOMERS AND POLYMERS OF Epsilon -CAPROLACTAM AND MIXTURES OF THESE COMPOUNDS ARE PURIFIED FROM IMPURITY COMPOUNDS SUCH AS PHOSPHORIC ACID AND IONIZED METAL COMPOUNDS CONTAINED THEREIN BY BRINGING THE Epsilon -CAPROLACTAM MATERIAL INTO CONTACT WITH AN AQUEOUS SOLUTION CONTAINING 15 TO 75 PERCENT BY WEIGHT OF AT LEAST ONE ALKALI METAL PHOSPHATE TO EXTRACT THE IMPURITY COMPOUND FROM THE Epsilon -CAPROLACTAM MATERIAL INTO THE PHOSPHATE AQUEOUS SOLUTION AND, THEREAFTER, SEPARATING THE Epsilon -CAPROLACTAM MATERIAL FROM THE PHOSPHATE AQUEOUS SOLUTION BY WAY OF SETTLING OR CENTRIFUGING THE MIXTURE.

Abstract translation: ε-CABROLACTAM材料如EPS-CABROLACTAM的单体，低聚物和聚合物以及这些化合物的混合物，通过使ε-CABROLACTAM材料与含有AQUEOUS溶液接触的方式从包含在其中的酸性化合物和非离子化的金属化合物等净化化合物中纯化。 以至少一种碱金属磷酸盐的重量计为15至75％，以将来自ε-磷酸铵材料的重量化合物从磷酸盐水溶液中萃取，并且通过沉降或离心方式从磷酸盐水溶液中分离出ε-吡咯烷酮材料 混合物。

公开(公告)号：US2806847A

公开(公告)日：1957-09-17

申请号：US2806847D

CPC classification number: C07D201/12

公开(公告)号：US08193348B2

公开(公告)日：2012-06-05

申请号：US12474968

申请日：2009-05-29

Applicant: Chien-Hsien Li

Inventor： Chien-Hsien Li

IPC: C07D201/16

CPC classification number: C07D201/16 ,  C07D201/12

Abstract: A system and a method for recovering caprolactam from a rearrangement mixture are provided. The system includes a neutralization unit; a buffering unit for receiving a crude lactam solution containing impurities content below a standard value and being fed from the neutralization unit; a temporary storage unit for receiving a crude lactam solution containing impurities above the standard value and being fed from the neutralization unit; a temporary extraction unit for performing batch extraction to separate out a first lactam solution; an extraction unit for performing continuous extraction to separate out a second lactam solution; and a recovery unit for allowing caprolactam to be recovered. In the present system and method, the crude lactam solution is selectively fed into the extraction unit for continuous extraction or to the temporary extraction unit for batch extraction, thereby maintaining continuity of operation, enhancing separation efficiency, and reducing both material consumption and purification loadings.

Abstract translation: 提供了从重排混合物中回收己内酰胺的体系和方法。 该系统包括中和单元; 缓冲单元，用于接收含有低于标准值的杂质含量的粗内酰胺溶液并从中和单元进料; 临时存储单元，用于接收含有高于标准值的杂质的粗内酰胺溶液并从中和单元进料; 临时提取单元，用于进行分批提取以分离出第一内酰胺溶液; 提取单元，用于进行连续提取以分离第二内酰胺溶液; 和用于使己内酰胺回收的回收单元。 在本系统和方法中，将粗内酰胺溶液选择性地进料到用于连续萃取的提取单元中或者用于批量提取的临时提取单元，从而保持操作的连续性，提高分离效率，并减少材料消耗和净化负荷。

公开(公告)号：US20050054739A1

公开(公告)日：2005-03-10

申请号：US10897473

申请日：2004-07-23

Applicant: Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

Inventor： Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

IPC: C07D201/12 ,  C08F6/00

CPC classification number: C07D201/12

Abstract: The invention relates to a method for the treatment of waste containing polyamide comprising a) depolymerisation of the waste containing polyamide, whereby a caprolactam raw material (6) and a flow (3), comprising the secondary constituents and additives from the depolymerisation, are obtained, and b) leaching of the flow (3) at least once using an extracting agent.

Abstract translation: 本发明涉及一种处理含有聚酰胺的废物的方法，包括：a）含有聚酰胺的废物的解聚，由此获得包含来自解聚的第二组分和添加剂的己内酰胺原料（6）和流动物（3） ，和b）使用提取剂至少一次浸出所述流（3）。